effluent treatment plant
EffluentÂ isÂ definedÂ by the United States Environmental Protection Agency as "wastewater -Â treatedÂ or untreated - that flows out of aÂ treatment plant,Â sewer, or industrial outfall. Generally refers to wastes discharged into surface waters". ... This cleanerÂ effluentÂ is then used to feed the bacteria in biofilters.